Dill and fennel are very similar. If you want to distinguish them from their appearance, you can only distinguish them after the seeds are dried. They look like fennel, and they also open small yellow flowers, and they will have small fruits. Their leaves are bright green, and they are in the shape of feathers. They can't be distinguished from leaves to flowers. After drying, Dill's achene has a main edge and two wings like lateral edges, which are better than fennel. One more edge, while fennel's meristem has only five main ridges.
There is a difference between the two flavors. Dill has a very strong spicy flavor. Its fragrance is not irritating. It smells very mild and can play a role in relieving emotions. It has a similar taste to cream, while anise has a sweet smell and a strong taste.